SSD are indeed the future. They do degrade with age though, but in a different way to HDD's. The reason a HDD slows down is that you constantly add more little files to be loaded at startup. Things like Skype, email, antivirus, steam and origin, GPU control software, iTunes etc all end up meaning it just takes the HDD longer to load the files. SSD's are quick enough to cope with this and able to access data stored anywhere on the drive just as quick as any other. HDD's can get a bit confused when you ask them to do 20 things at once, SSD not so much.
Anyway yes everyone should have a SSD if they possibly can.